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A gray kangaroo can bound accross a flat stretch of ground with each jump carrying it 11 m from the takeoff point. If the kangaroo leaves the ground at a 18 degree angle, what is its takeoff speed?
A gas enclosed in a container fitted with a piston of consistent area of .15m squared. the pressure of the gas is maintained at 6000 pa as the piston moves inward 20cm. calculate the work done by th
In one of the original Doppler experiments, a tuba was played on a moving flat train car at a frequency of 79 Hz, and a second identical tuba played the same tone while at rest in the railway statio
A parallel-plate capacitor has a capacitance of 6.5F when filled with a dielectric. The total area of each plate is 1.5 m2 and the separation between the plates is 0.68 10-5 m. What is the dielectri
Laser light with a wavelength = 680 illuminates a pair of slits at normal incidence.What slit separation will produce first-order maxima at angles of 40 from the incident direction?
Both jets move at 0.865 c relative to the galaxy. Determine the magnitude of the velocity of on jet relative to the other.
Two objects attract each other gravitationally with a force of 2.7 10-10 N when they are 0.25 m apart. Their total mass is 4.0 kg. Find their individual masses.
An Earth satellite moves in a circular orbit 557 km above Earth's surface with a period of 95.59 min. What are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite?
A Federation starship (9.5 106 kg) uses its tractor beam to pull a shuttlecraft (7.0 104 kg ) aboard from a distance of 18 km away. The tractor beam exerts a constant force of 4.0 104 N on the shutt
A cord 15.0-m long has a mass of 3.00 grams. What is its linear mass density in kilograms/meter? If the tension in the cord were provided by a 2.5-kg mass.
An elevator moves downward in a tall building at a constant speed of 4.10 m/s. exactly 6.25 s after the top of the elevator car passes a bolt loosely attached to the wall of the elevator shaft, the
Lillian (mass 42.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. What is the speed of Lilian and her dog after the catch?
The amplitude of the motion is .093 m. What is the magnitude of the velocity of the mass when the displacement is equal to .0199 m?
A bullet is fired from ground level with a speed of 150 m/s at an angle of 30 degrees above the horizontal. What is the velocity of the bullet when it is at the highest point of its trajectory?
A 3.50-m-long, 400 steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 75.0 construction worker stands at the far end of
The coefficient of static friction between his hands and the book is 0.34. To keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?
A small object with a mass of 430 mg carries a charge of 40.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the
A pipe open at one end only has a fundamental frequency of 286 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Now, when both pipes v
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.53 m and 1.03 m, respectively. The respective rotational speeds are 449 rev/min and 4147 rev/min. Calculate the spe
Two students are on a balcony 20.0 m above the street. One student throws a ball (ball 1) vertically downward at 12.7 m/s; at the same instant, the other student throws a ball (ball 2) vertically up
A 1.25-kg ball begins rolling from rest with constant angular acceleration down a hill. If it takes 3.60 s for it to make the first complete revolution, how long will it take to?
Two large, parallel, conducting plates are 9.1 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 4.2 x 10-15 N acts on an electron p
(Assume a smooth transition at the bottom of the incline.) If the collision is elastic, and friction can be ignored. Determine the speeds of the two blocks after the collision.
An airplane flies horizontally with speed 1000km/h(280m/s) an engine falls it takes 30s to gets to the ground. neglect air resistance show the airplane is 4.5km high?
A small, 100g cart is moving at 1.2 m/s on an air track when it collides with a larger, 1.00kg cart at rest. After the collision, the small cart recoils at .850 m/s. what is the speed of the large c